Thanks Michael. On Fri, Feb 11, 2011 at 1:44 PM, Michael Bayer <mike...@zzzcomputing.com>wrote:
> > On Feb 11, 2011, at 3:05 PM, Romy wrote: > > > On Feb 11, 9:13 am, Michael Bayer <mike...@zzzcomputing.com> wrote: > >> autocommit=True means every SELECT statement as well as every flush() > uses its own transaction, that begins as the method is called, and is > immediately closed, within the scope of the method call on your end. > begin() *only* works when autocommit=True, and only affects the way > SQLAlchemy pulls connections from the connection pool. DBAPI has no > "begin", the connection itself is always in a transaction as soon as > statements are emitted, unless commit() or rollback() is called. > > > > In the entire time I've been running autocommit=True (on myISAM), I've > > never seen SELECTs get their own transaction in the log output, while > > every UPDATE/INSERT does. Is there something wrong w/ the log output ? > > again, as far as the DBAPI is concerned, everything is "in a transaction", > the myISAM tables just ignore it. The COMMIT is emitted by SQLalchemy if > the statement within the autocommit execution was a DML (CRUD) statement. > See > http://www.sqlalchemy.org/docs/core/connections.html#understanding-autocommit(I'd > recommend reading the whole page as well as > http://www.sqlalchemy.org/docs/orm/session.html) > > > > > > -- > > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > > To post to this group, send email to sqlalchemy@googlegroups.com. > > To unsubscribe from this group, send email to > sqlalchemy+unsubscr...@googlegroups.com. > > For more options, visit this group at > http://groups.google.com/group/sqlalchemy?hl=en. > > > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To post to this group, send email to sqlalchemy@googlegroups.com. > To unsubscribe from this group, send email to > sqlalchemy+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/sqlalchemy?hl=en. > > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
